Although that has yetto be proven, quantum mechanics was able to explain how three of the forces operate on the subatomic level. And all of a sudden we had a consistent theory of elementary particle physics, which allows us to describe all of the interactions- weak, strong and electromagnetic- in the same language.
Sama seperti batu es meleleh ke air di bawah terik matahari, percobaan menunjukkan bahwa ketika kita mundur ke sangat panas kondisi Big Bang, yang lemah dan gaya elektromagnetik berbaur bersama-sama dan bersatu menjadi sebuah kekuatan tunggal disebut "elektrolemah."